The jury at Birmingham Crown Court was told the couple, from Waltham Gardens, Banbury, Oxfordshire, had given their child the middle name “Adolf”, which self-confessed racist Thomas said in evidence was in “admiration” of Hitler.

Photographs recovered from their home showed Thomas cradling his newborn son while wearing the hooded white robes of a Ku Klux Klansman.

A third defendant – a leading member in National Action’s Midlands’ chapter, warehouse worker Daniel Bogunovic, 27, of Crown Hills Rise, Leicester – was also convicted of being a National Action member.

Former Amazon security guard Thomas and Patatas, a photographer originally from Portugal, were found guilty after a seven-week trial at Birmingham Crown Court.

Jurors were told Bogunovic already had a conviction from earlier this year for stirring up racial hatred after being part of a group that plastered Aston University, in Birmingham, with the group’s offensive stickers.

Neo-Nazi Claudia Patatas was convicted with her partner, Adam Thomas, of membership of a banned terror group (Picture: PA)

Thomas, a twice-failed Army applicant, was also convicted of having a terrorist manual, namely the Anarchist’s Cookbook, which contained instructions on making “viable” bombs.

The Crown’s case was that after being banned by the government in December 2016, National Action simply “shed one skin for another” and “rebranded”.

Jurors heard evidence of social media chats involving Thomas, Patatas and Bogunovic, discussing what prosecutors have alleged was the banned group’s continuing operation, under a different name.

The jury also heard that Thomas and Patatas plastered National Action stickers in public locations after the ban, while Bogunovic was calling for a “leadership” meeting in a chat group for senior members in April 2017.

Three other men who had been due to stand trial alongside the trio, admitted being National Action members before the trial began.